42 lines
1.2 KiB
Go
42 lines
1.2 KiB
Go
package shared
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import "encoding/binary"
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const PROTO_VERSION uint16 = 1
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const (
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unused uint16 = iota
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// (client -> server) requests an IP
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// [ pubkey - 1216 bytes ]
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REQ_REGISTER
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// (server -> client) assigns an IP
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// [ ip - 16 bytes ]
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RESP_REGISTER
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// (client -> server -> client2) relays an encrypted packet to a specified peer
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// [ destIP - 16 bytes ] [ srcIP - 16 bytes ] [ encrypted pkt ]
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ENC_PKT
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// (client -> server -> *) broadcasts an unsecured packet
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// [ plaintext pkt ]
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BROADCAST_PKT
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// (client -> server) requests peer's pubkey from the server for encapsulation
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// [ ip - 16 bytes ]
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REQ_GET_PUBKEY
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// (server -> client) provides requested pubkey
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// [ ip - 16 bytes ] [ pubkey - 1216 bytes ]
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RESP_GET_PUBKEY
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// (client -> server -> client2) establishes a session key with another peer
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// [ destIP - 16 bytes ] [ srcIP - 16 bytes ] [ ciphertext - 1120 bytes ]
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REQ_ESTABLISH
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// (client2 -> server -> client) acknowledges the session key was established
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// [ destIP - 16 bytes ] [ srcIP - 16 bytes ]
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RESP_ESTABLISH
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)
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func BuildPkt(pktType uint16, data []byte) []byte {
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out := make([]byte, 4+len(data))
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binary.LittleEndian.PutUint16(out[0:], PROTO_VERSION)
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binary.LittleEndian.PutUint16(out[2:], pktType)
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copy(out[4:], data)
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return out
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}
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